On 5 Nov 1770 when Phineas was 21, he married Elizabeth Stearns (54173) , daughter of Dea. Isaac Stearns (37956) (14 May 1710-25 Nov 1779) & Elizabeth Child (37926) (18 Feb 1706/7-10 Jul 1791).30 Born on 17 Mar 1752. Elizabeth died in May 1832.

Children of Phinehas and Elizabeth (Stearns) Lawrence:
    i. Susanna, b. 18 Jun 1771, m. 26 Sep 1793 Rev. Nathan Underwood of Hardwick;
    ii. Elizabeth, b. & d. 1773;
    iii. Phineas, b. 19 Feb 1775, m. 22 Dec 1796 Polly Wellington;
    iv. Leonard, b. 6 May 1777, d. Dec 1851, Deacon, m. Nancy;
    v. Elizabeth, b. 2 Sep 1779, m. 12 Dec 1797 Abraham Wellington;
    vi. Priscilla, b. 26 Dec 1780, d. 24 Jul 1803 unmarried;
    vii. Mary, b. 25 May 1785, m. 23 Sep 1810 Chester Lyman of Roxbury;
    viii. Nathan, b. 18 Jun 1787;
    ix. Abigail, b. 18 Jun 1789;
    x. Jacob, b. 11 Jun 1792; and
    xi. Lucretia, b. 19 Jan 1797.30